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Commit | Line | Data |
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0a8165d7 | 1 | /* |
fbfa2cc5 JK |
2 | * fs/f2fs/file.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/stat.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/writeback.h> | |
ae51fb31 | 16 | #include <linux/blkdev.h> |
fbfa2cc5 JK |
17 | #include <linux/falloc.h> |
18 | #include <linux/types.h> | |
e9750824 | 19 | #include <linux/compat.h> |
fbfa2cc5 JK |
20 | #include <linux/uaccess.h> |
21 | #include <linux/mount.h> | |
22 | ||
23 | #include "f2fs.h" | |
24 | #include "node.h" | |
25 | #include "segment.h" | |
26 | #include "xattr.h" | |
27 | #include "acl.h" | |
28 | ||
29 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
30 | struct vm_fault *vmf) | |
31 | { | |
32 | struct page *page = vmf->page; | |
6131ffaa | 33 | struct inode *inode = file_inode(vma->vm_file); |
fbfa2cc5 | 34 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
35 | block_t old_blk_addr; |
36 | struct dnode_of_data dn; | |
39936837 | 37 | int err, ilock; |
fbfa2cc5 JK |
38 | |
39 | f2fs_balance_fs(sbi); | |
40 | ||
41 | sb_start_pagefault(inode->i_sb); | |
42 | ||
fbfa2cc5 | 43 | /* block allocation */ |
39936837 | 44 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 45 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 46 | err = get_dnode_of_data(&dn, page->index, ALLOC_NODE); |
fbfa2cc5 | 47 | if (err) { |
39936837 | 48 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
49 | goto out; |
50 | } | |
51 | ||
52 | old_blk_addr = dn.data_blkaddr; | |
fbfa2cc5 JK |
53 | |
54 | if (old_blk_addr == NULL_ADDR) { | |
55 | err = reserve_new_block(&dn); | |
56 | if (err) { | |
57 | f2fs_put_dnode(&dn); | |
39936837 | 58 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
59 | goto out; |
60 | } | |
61 | } | |
62 | f2fs_put_dnode(&dn); | |
39936837 | 63 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
64 | |
65 | lock_page(page); | |
66 | if (page->mapping != inode->i_mapping || | |
67 | page_offset(page) >= i_size_read(inode) || | |
68 | !PageUptodate(page)) { | |
69 | unlock_page(page); | |
70 | err = -EFAULT; | |
71 | goto out; | |
72 | } | |
73 | ||
74 | /* | |
75 | * check to see if the page is mapped already (no holes) | |
76 | */ | |
77 | if (PageMappedToDisk(page)) | |
78 | goto out; | |
79 | ||
80 | /* fill the page */ | |
81 | wait_on_page_writeback(page); | |
82 | ||
83 | /* page is wholly or partially inside EOF */ | |
84 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
85 | unsigned offset; | |
86 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
87 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
88 | } | |
89 | set_page_dirty(page); | |
90 | SetPageUptodate(page); | |
91 | ||
92 | file_update_time(vma->vm_file); | |
93 | out: | |
94 | sb_end_pagefault(inode->i_sb); | |
95 | return block_page_mkwrite_return(err); | |
96 | } | |
97 | ||
98 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d JK |
99 | .fault = filemap_fault, |
100 | .page_mkwrite = f2fs_vm_page_mkwrite, | |
101 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
102 | }; |
103 | ||
fbfa2cc5 JK |
104 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
105 | { | |
106 | struct inode *inode = file->f_mapping->host; | |
107 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
fbfa2cc5 JK |
108 | int ret = 0; |
109 | bool need_cp = false; | |
110 | struct writeback_control wbc = { | |
111 | .sync_mode = WB_SYNC_ALL, | |
112 | .nr_to_write = LONG_MAX, | |
113 | .for_reclaim = 0, | |
114 | }; | |
115 | ||
1fa95b0b NJ |
116 | if (inode->i_sb->s_flags & MS_RDONLY) |
117 | return 0; | |
118 | ||
fbfa2cc5 JK |
119 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
120 | if (ret) | |
121 | return ret; | |
122 | ||
7d82db83 JK |
123 | /* guarantee free sections for fsync */ |
124 | f2fs_balance_fs(sbi); | |
125 | ||
fbfa2cc5 JK |
126 | mutex_lock(&inode->i_mutex); |
127 | ||
fbfa2cc5 JK |
128 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
129 | goto out; | |
130 | ||
fbfa2cc5 JK |
131 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
132 | need_cp = true; | |
953a3e27 | 133 | else if (is_cp_file(inode)) |
fbfa2cc5 | 134 | need_cp = true; |
facb0205 | 135 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 136 | need_cp = true; |
953a3e27 | 137 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 JK |
138 | need_cp = true; |
139 | ||
fbfa2cc5 JK |
140 | if (need_cp) { |
141 | /* all the dirty node pages should be flushed for POR */ | |
142 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
fbfa2cc5 | 143 | } else { |
398b1ac5 JK |
144 | /* if there is no written node page, write its inode page */ |
145 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
146 | ret = f2fs_write_inode(inode, NULL); | |
147 | if (ret) | |
148 | goto out; | |
149 | } | |
fbfa2cc5 JK |
150 | filemap_fdatawait_range(sbi->node_inode->i_mapping, |
151 | 0, LONG_MAX); | |
ae51fb31 | 152 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
fbfa2cc5 JK |
153 | } |
154 | out: | |
155 | mutex_unlock(&inode->i_mutex); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
160 | { | |
161 | file_accessed(file); | |
162 | vma->vm_ops = &f2fs_file_vm_ops; | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static int truncate_data_blocks_range(struct dnode_of_data *dn, int count) | |
167 | { | |
168 | int nr_free = 0, ofs = dn->ofs_in_node; | |
169 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
170 | struct f2fs_node *raw_node; | |
171 | __le32 *addr; | |
172 | ||
173 | raw_node = page_address(dn->node_page); | |
174 | addr = blkaddr_in_node(raw_node) + ofs; | |
175 | ||
176 | for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { | |
177 | block_t blkaddr = le32_to_cpu(*addr); | |
178 | if (blkaddr == NULL_ADDR) | |
179 | continue; | |
180 | ||
181 | update_extent_cache(NULL_ADDR, dn); | |
182 | invalidate_blocks(sbi, blkaddr); | |
183 | dec_valid_block_count(sbi, dn->inode, 1); | |
184 | nr_free++; | |
185 | } | |
186 | if (nr_free) { | |
187 | set_page_dirty(dn->node_page); | |
188 | sync_inode_page(dn); | |
189 | } | |
190 | dn->ofs_in_node = ofs; | |
191 | return nr_free; | |
192 | } | |
193 | ||
194 | void truncate_data_blocks(struct dnode_of_data *dn) | |
195 | { | |
196 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
197 | } | |
198 | ||
199 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
200 | { | |
201 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
202 | struct page *page; | |
203 | ||
204 | if (!offset) | |
205 | return; | |
206 | ||
207 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT); | |
208 | if (IS_ERR(page)) | |
209 | return; | |
210 | ||
211 | lock_page(page); | |
212 | wait_on_page_writeback(page); | |
213 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); | |
214 | set_page_dirty(page); | |
215 | f2fs_put_page(page, 1); | |
216 | } | |
217 | ||
218 | static int truncate_blocks(struct inode *inode, u64 from) | |
219 | { | |
220 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
221 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
222 | struct dnode_of_data dn; | |
223 | pgoff_t free_from; | |
39936837 | 224 | int count = 0, ilock = -1; |
fbfa2cc5 JK |
225 | int err; |
226 | ||
227 | free_from = (pgoff_t) | |
228 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
229 | ||
39936837 | 230 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 231 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 232 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
233 | if (err) { |
234 | if (err == -ENOENT) | |
235 | goto free_next; | |
39936837 | 236 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
237 | return err; |
238 | } | |
239 | ||
240 | if (IS_INODE(dn.node_page)) | |
241 | count = ADDRS_PER_INODE; | |
242 | else | |
243 | count = ADDRS_PER_BLOCK; | |
244 | ||
245 | count -= dn.ofs_in_node; | |
246 | BUG_ON(count < 0); | |
39936837 | 247 | |
fbfa2cc5 JK |
248 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
249 | truncate_data_blocks_range(&dn, count); | |
250 | free_from += count; | |
251 | } | |
252 | ||
253 | f2fs_put_dnode(&dn); | |
254 | free_next: | |
255 | err = truncate_inode_blocks(inode, free_from); | |
39936837 | 256 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
257 | |
258 | /* lastly zero out the first data page */ | |
259 | truncate_partial_data_page(inode, from); | |
260 | ||
261 | return err; | |
262 | } | |
263 | ||
264 | void f2fs_truncate(struct inode *inode) | |
265 | { | |
266 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
267 | S_ISLNK(inode->i_mode))) | |
268 | return; | |
269 | ||
270 | if (!truncate_blocks(inode, i_size_read(inode))) { | |
271 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
272 | mark_inode_dirty(inode); | |
273 | } | |
fbfa2cc5 JK |
274 | } |
275 | ||
276 | static int f2fs_getattr(struct vfsmount *mnt, | |
277 | struct dentry *dentry, struct kstat *stat) | |
278 | { | |
279 | struct inode *inode = dentry->d_inode; | |
280 | generic_fillattr(inode, stat); | |
281 | stat->blocks <<= 3; | |
282 | return 0; | |
283 | } | |
284 | ||
285 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
286 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
287 | { | |
288 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
289 | unsigned int ia_valid = attr->ia_valid; | |
290 | ||
291 | if (ia_valid & ATTR_UID) | |
292 | inode->i_uid = attr->ia_uid; | |
293 | if (ia_valid & ATTR_GID) | |
294 | inode->i_gid = attr->ia_gid; | |
295 | if (ia_valid & ATTR_ATIME) | |
296 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
297 | inode->i_sb->s_time_gran); | |
298 | if (ia_valid & ATTR_MTIME) | |
299 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
300 | inode->i_sb->s_time_gran); | |
301 | if (ia_valid & ATTR_CTIME) | |
302 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
303 | inode->i_sb->s_time_gran); | |
304 | if (ia_valid & ATTR_MODE) { | |
305 | umode_t mode = attr->ia_mode; | |
306 | ||
307 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
308 | mode &= ~S_ISGID; | |
309 | set_acl_inode(fi, mode); | |
310 | } | |
311 | } | |
312 | #else | |
313 | #define __setattr_copy setattr_copy | |
314 | #endif | |
315 | ||
316 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
317 | { | |
318 | struct inode *inode = dentry->d_inode; | |
319 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
320 | int err; | |
321 | ||
322 | err = inode_change_ok(inode, attr); | |
323 | if (err) | |
324 | return err; | |
325 | ||
326 | if ((attr->ia_valid & ATTR_SIZE) && | |
327 | attr->ia_size != i_size_read(inode)) { | |
328 | truncate_setsize(inode, attr->ia_size); | |
329 | f2fs_truncate(inode); | |
d4686d56 | 330 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
331 | } |
332 | ||
333 | __setattr_copy(inode, attr); | |
334 | ||
335 | if (attr->ia_valid & ATTR_MODE) { | |
336 | err = f2fs_acl_chmod(inode); | |
337 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { | |
338 | inode->i_mode = fi->i_acl_mode; | |
339 | clear_inode_flag(fi, FI_ACL_MODE); | |
340 | } | |
341 | } | |
342 | ||
343 | mark_inode_dirty(inode); | |
344 | return err; | |
345 | } | |
346 | ||
347 | const struct inode_operations f2fs_file_inode_operations = { | |
348 | .getattr = f2fs_getattr, | |
349 | .setattr = f2fs_setattr, | |
350 | .get_acl = f2fs_get_acl, | |
351 | #ifdef CONFIG_F2FS_FS_XATTR | |
352 | .setxattr = generic_setxattr, | |
353 | .getxattr = generic_getxattr, | |
354 | .listxattr = f2fs_listxattr, | |
355 | .removexattr = generic_removexattr, | |
356 | #endif | |
357 | }; | |
358 | ||
359 | static void fill_zero(struct inode *inode, pgoff_t index, | |
360 | loff_t start, loff_t len) | |
361 | { | |
bd43df02 | 362 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 | 363 | struct page *page; |
39936837 | 364 | int ilock; |
fbfa2cc5 JK |
365 | |
366 | if (!len) | |
367 | return; | |
368 | ||
bd43df02 JK |
369 | f2fs_balance_fs(sbi); |
370 | ||
39936837 | 371 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 372 | page = get_new_data_page(inode, index, false); |
39936837 | 373 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
374 | |
375 | if (!IS_ERR(page)) { | |
376 | wait_on_page_writeback(page); | |
377 | zero_user(page, start, len); | |
378 | set_page_dirty(page); | |
379 | f2fs_put_page(page, 1); | |
380 | } | |
381 | } | |
382 | ||
383 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
384 | { | |
385 | pgoff_t index; | |
386 | int err; | |
387 | ||
388 | for (index = pg_start; index < pg_end; index++) { | |
389 | struct dnode_of_data dn; | |
fbfa2cc5 | 390 | |
fbfa2cc5 | 391 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 392 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 393 | if (err) { |
fbfa2cc5 JK |
394 | if (err == -ENOENT) |
395 | continue; | |
396 | return err; | |
397 | } | |
398 | ||
399 | if (dn.data_blkaddr != NULL_ADDR) | |
400 | truncate_data_blocks_range(&dn, 1); | |
401 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
402 | } |
403 | return 0; | |
404 | } | |
405 | ||
406 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) | |
407 | { | |
408 | pgoff_t pg_start, pg_end; | |
409 | loff_t off_start, off_end; | |
410 | int ret = 0; | |
411 | ||
412 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
413 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
414 | ||
415 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
416 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
417 | ||
418 | if (pg_start == pg_end) { | |
419 | fill_zero(inode, pg_start, off_start, | |
420 | off_end - off_start); | |
421 | } else { | |
422 | if (off_start) | |
423 | fill_zero(inode, pg_start++, off_start, | |
424 | PAGE_CACHE_SIZE - off_start); | |
425 | if (off_end) | |
426 | fill_zero(inode, pg_end, 0, off_end); | |
427 | ||
428 | if (pg_start < pg_end) { | |
429 | struct address_space *mapping = inode->i_mapping; | |
430 | loff_t blk_start, blk_end; | |
1127a3d4 | 431 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
39936837 | 432 | int ilock; |
1127a3d4 JH |
433 | |
434 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
435 | |
436 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
437 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
438 | truncate_inode_pages_range(mapping, blk_start, | |
439 | blk_end - 1); | |
39936837 JK |
440 | |
441 | ilock = mutex_lock_op(sbi); | |
fbfa2cc5 | 442 | ret = truncate_hole(inode, pg_start, pg_end); |
39936837 | 443 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
444 | } |
445 | } | |
446 | ||
447 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
448 | i_size_read(inode) <= (offset + len)) { | |
449 | i_size_write(inode, offset); | |
450 | mark_inode_dirty(inode); | |
451 | } | |
452 | ||
453 | return ret; | |
454 | } | |
455 | ||
456 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
457 | loff_t len, int mode) | |
458 | { | |
459 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
460 | pgoff_t index, pg_start, pg_end; | |
461 | loff_t new_size = i_size_read(inode); | |
462 | loff_t off_start, off_end; | |
463 | int ret = 0; | |
464 | ||
465 | ret = inode_newsize_ok(inode, (len + offset)); | |
466 | if (ret) | |
467 | return ret; | |
468 | ||
469 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
470 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
471 | ||
472 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
473 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
474 | ||
475 | for (index = pg_start; index <= pg_end; index++) { | |
476 | struct dnode_of_data dn; | |
39936837 | 477 | int ilock; |
fbfa2cc5 | 478 | |
39936837 | 479 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 480 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 481 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
fbfa2cc5 | 482 | if (ret) { |
39936837 | 483 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
484 | break; |
485 | } | |
486 | ||
487 | if (dn.data_blkaddr == NULL_ADDR) { | |
488 | ret = reserve_new_block(&dn); | |
489 | if (ret) { | |
490 | f2fs_put_dnode(&dn); | |
39936837 | 491 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
492 | break; |
493 | } | |
494 | } | |
495 | f2fs_put_dnode(&dn); | |
39936837 | 496 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
497 | |
498 | if (pg_start == pg_end) | |
499 | new_size = offset + len; | |
500 | else if (index == pg_start && off_start) | |
501 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
502 | else if (index == pg_end) | |
503 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
504 | else | |
505 | new_size += PAGE_CACHE_SIZE; | |
506 | } | |
507 | ||
508 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
509 | i_size_read(inode) < new_size) { | |
510 | i_size_write(inode, new_size); | |
511 | mark_inode_dirty(inode); | |
512 | } | |
513 | ||
514 | return ret; | |
515 | } | |
516 | ||
517 | static long f2fs_fallocate(struct file *file, int mode, | |
518 | loff_t offset, loff_t len) | |
519 | { | |
6131ffaa | 520 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
521 | long ret; |
522 | ||
523 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
524 | return -EOPNOTSUPP; | |
525 | ||
526 | if (mode & FALLOC_FL_PUNCH_HOLE) | |
527 | ret = punch_hole(inode, offset, len, mode); | |
528 | else | |
529 | ret = expand_inode_data(inode, offset, len, mode); | |
530 | ||
3af60a49 NJ |
531 | if (!ret) { |
532 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
533 | mark_inode_dirty(inode); | |
534 | } | |
fbfa2cc5 JK |
535 | return ret; |
536 | } | |
537 | ||
538 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
539 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
540 | ||
541 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
542 | { | |
543 | if (S_ISDIR(mode)) | |
544 | return flags; | |
545 | else if (S_ISREG(mode)) | |
546 | return flags & F2FS_REG_FLMASK; | |
547 | else | |
548 | return flags & F2FS_OTHER_FLMASK; | |
549 | } | |
550 | ||
551 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
552 | { | |
6131ffaa | 553 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
554 | struct f2fs_inode_info *fi = F2FS_I(inode); |
555 | unsigned int flags; | |
556 | int ret; | |
557 | ||
558 | switch (cmd) { | |
559 | case FS_IOC_GETFLAGS: | |
560 | flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
561 | return put_user(flags, (int __user *) arg); | |
562 | case FS_IOC_SETFLAGS: | |
563 | { | |
564 | unsigned int oldflags; | |
565 | ||
566 | ret = mnt_want_write(filp->f_path.mnt); | |
567 | if (ret) | |
568 | return ret; | |
569 | ||
570 | if (!inode_owner_or_capable(inode)) { | |
571 | ret = -EACCES; | |
572 | goto out; | |
573 | } | |
574 | ||
575 | if (get_user(flags, (int __user *) arg)) { | |
576 | ret = -EFAULT; | |
577 | goto out; | |
578 | } | |
579 | ||
580 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
581 | ||
582 | mutex_lock(&inode->i_mutex); | |
583 | ||
584 | oldflags = fi->i_flags; | |
585 | ||
586 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
587 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
588 | mutex_unlock(&inode->i_mutex); | |
589 | ret = -EPERM; | |
590 | goto out; | |
591 | } | |
592 | } | |
593 | ||
594 | flags = flags & FS_FL_USER_MODIFIABLE; | |
595 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
596 | fi->i_flags = flags; | |
597 | mutex_unlock(&inode->i_mutex); | |
598 | ||
599 | f2fs_set_inode_flags(inode); | |
600 | inode->i_ctime = CURRENT_TIME; | |
601 | mark_inode_dirty(inode); | |
602 | out: | |
603 | mnt_drop_write(filp->f_path.mnt); | |
604 | return ret; | |
605 | } | |
606 | default: | |
607 | return -ENOTTY; | |
608 | } | |
609 | } | |
610 | ||
e9750824 NJ |
611 | #ifdef CONFIG_COMPAT |
612 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
613 | { | |
614 | switch (cmd) { | |
615 | case F2FS_IOC32_GETFLAGS: | |
616 | cmd = F2FS_IOC_GETFLAGS; | |
617 | break; | |
618 | case F2FS_IOC32_SETFLAGS: | |
619 | cmd = F2FS_IOC_SETFLAGS; | |
620 | break; | |
621 | default: | |
622 | return -ENOIOCTLCMD; | |
623 | } | |
624 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
625 | } | |
626 | #endif | |
627 | ||
fbfa2cc5 JK |
628 | const struct file_operations f2fs_file_operations = { |
629 | .llseek = generic_file_llseek, | |
630 | .read = do_sync_read, | |
631 | .write = do_sync_write, | |
632 | .aio_read = generic_file_aio_read, | |
633 | .aio_write = generic_file_aio_write, | |
634 | .open = generic_file_open, | |
635 | .mmap = f2fs_file_mmap, | |
636 | .fsync = f2fs_sync_file, | |
637 | .fallocate = f2fs_fallocate, | |
638 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
639 | #ifdef CONFIG_COMPAT |
640 | .compat_ioctl = f2fs_compat_ioctl, | |
641 | #endif | |
fbfa2cc5 JK |
642 | .splice_read = generic_file_splice_read, |
643 | .splice_write = generic_file_splice_write, | |
644 | }; |